New Twiddle

controllers.application.js

import Ember from 'ember';
import { task, timeout } from 'ember-concurrency';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  logs: Ember.computed(function() {
    return Ember.A();
  }),
  doWork: task(function*() {
    console.log(arguments);
    let logs = this.get('logs');
    logs.pushObject('starting work');
    yield timeout(2000);
    this.get('doWork').perform();
    logs.pushObject('ending work');
  }).enqueue(),
  actions: {
    triggerJob() {
      this.get('doWork').perform();
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<button {{action 'triggerJob'}}>Trigger</button>
{{#each logs as |log|}}
	<div>{{log}}</div>
{{/each}}
<br>
<br>

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3",
    "ember-concurrency": "0.8.13"
  }
}